Must be an antenna issue, or they were off the air for a bit but 25.6 was fine at 4am for a recording and is fine now, South of you in Burnsville. I also get the 41s all the time, both with my 4228 8-bay attic antenna.
I live in Bloomington and just rescanned stations on my TV. The 25-x stations are no longer there, but all of a sudden the 41-x stations showed up.
Atmospheric conditions in the summer time (when the sun is at a higher angle and the clouds are more dense with moisture) make the low-power stations fade in and out, especially, if you have fringe reception on those low power stations.
They are doing some work at the Telefarm tonight because 4-1, 5-1, 5-2 and 11-1 (and their subs) are all off the air as of 12:45AM
WCCO had a scroll that they were going off the air around 12:37 (after Corden) due to "scheduled maintenance" and said it would affect WCCO, KCCO and KCCW (funny as the latter two are nowhere near Minneapolis) and would be back within an hour.
KSTP nor KSTC had anything noted (I was watching Pawn Stars when it went off)
WCCO went first, then KSTP & KSTC, and I guess lastly KARE
WUCW 23 is still on even though they are on the same tower (per wiki)